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Duke Energy Rates

Pending Duke Energy Indiana cases of note include its:

In the most recent IURC survey of residential electric bills, Duke Energy's average bill ranked fifth-highest among the electric utilities the IURC regulates.

Base rates cover most infrastructure and operating/maintenance costs while rate adjustment “trackers,” as described below, allow for more frequent rate changes for specific costs as designated by law.

Base Rates

Duke Energy's current base rates received IURC approval in 2025. For more information on the rate case, click here.

Previous base rates for Duke Energy Indiana received IURC approval in June 2020 (Cause No. 45253). Prior to the case, base rates made up about 60% of a typical Duke Energy residential bill, with trackers accounting for the rest.

The utility's prior base rates were approved in 2004.

Trackers

In addition to base rates, Indiana electric utilities recover and credit separate, specific costs through rate adjustment mechanisms known as "trackers." Rate adjustments via trackers are reviewed by the OUCC and approved by the IURC on a quarterly, semi-annual or annual basis.

Duke Energy's authorized trackers made up about 0.1% of a residential customer's typical electric bill as of September 2024.

Duke Energy is authorized to use the following trackers. All filings are available by entering the cause number in the IURC's Online Services Portal.

Tracker Recovers Costs for Frequency IURC Cause No.
Fuel Adjustment Clause (FAC) Coal and other fuels Quarterly 38707
Regional Transmission Operator (RTO) Participation in Midwest Independent Transmission System Operator (MISO) Quarterly 42736
Transmission, Distribution, & Storage System Charge (TDSIC) Projects in 7-year infrastructure plan Semi-Annual 45647
Environmental Compliance Adjustment (ECA) Federally mandated compliance costs including emissions control equipment Semi- Annual 42061
Federally Mandated Cost Adjustment (FMCA) Critical Infrastructure Protection Semi-Annual  44367
Demand Side Management (DSM) Energy efficiency programs Annual 46319
Summer Reliability Adjustment (SRA) Capacity resources needed for system reliability Annual 44348
Renewable Energy Project Adjustment Renewable Energy Projects Annual 44932
       
       

Additional Cases of Note

Previous Duke Energy cases before the IURC include:

  • Rate Case (Cause No. 46038)
  • Three-year energy efficiency plan (Cause No. 45803)
  • Solar purchase agreement (Cause No. 45907)
  • Federal mandate recovery plan (Cause No. 45940)
  • Coal ash compliance project (Cause No. 45749)
  • Financing request (Cause No. 45766)
  • Utility Receipts Tax reduction (Cause No. TD-50550)
  • Proposed distributed generation tariff (Cause No. 45508)
  • 2017 Tax Cuts & Jobs Act investigation (Cause No. 45032)
  • Advanced metering opt-out tariff (Cause No. 44963)
  • COVID-19 investigation (Cause No. 45380)
  • Coal Combustion Residuals rule compliance projects (Cause No. 44765)

Sales Taxes

The seven percent state sales tax applies to all Indiana electric utilities.

9-1-2026